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2 Sh t-Sh tl. A. LAPHAM. 86

Agricultural Boiler.

Patented Nov. 18, 1856."

N PETERS, Phoxo-umu m mr, Washington. 0.0.

. 2 Sheets.-Sheet 2.- A. LAPHAM.

Agricultural Boiler; 7 No. 16,092. Patented Nov, 18,1856.

UNITED STATES PATENT oE ioE.

A. LAPHAM, OF-BROOKLYN, NE\V YORK, ASSIGNOR TO HIMSELF AND STEPHEN WILKES.

COMBINED, STEAM BOILER AND KETTLE.

Specification of Letters Patent No. 16,092, dated November 18, 1856.

To all whom it may concern:

Be it known that I, ALLEN LAPI-IAM, of Brooklyn, county 'of Kings, and State of New York, have invented a new and useful Improvement in Steam Boilers and Kettles; and I do hereby declare the following to be a full, clear, and eXact description of the same, reference being had to the accompanying drawings, figures, and letters of reference marked thereon, in which- Figure 1, is an end view of my improved boiler and kettle. Fig. 2, is a vertical transverse section of it. Fig. 3, is a longitudinal section of it. Fig. 4, is a top elevation.

Similar letters of reference indicate like parts in all the drawings.

I-Ieretofore all devices of this kind have been costly and cumbrous, as the boiler and kettle wereseparate, thereby requiring much room, and also feeding the boiler with water had to be done with pumps thereby increasing the complication and expense.

To obviate these difficulties my invention consists in so arranging and combining the boiler and kettle, that the kettle shall form part of the boiler shell and have a channel of steam on all sides, whereby the material to be heated or boiled can be effected very rapidly from the large amount of surface the steam presents upon the kettle in connection with the feed water arrangement whereby I am enabled to feed the boiler without the use of pumps or force of any kind.

To enable others skilled in the art to make and use my invention I will describe the construction and operation.

A, represents the fire chamber supplied with a door ((Z) and grate bars (0) B, B, is the outer shell of the boiler; O, is the kettle; D, D, are reservoirs formed inside the boiler for holding a supply of feed water; E, E, are the fire tubes which are secured to the flue sheets, water tight by riveting ;F, F, are valves which when open admit the pressure of steam on the water contained in the reservoir; G, G, are valves on the bottom side of the reservoir which regulate the supply of feed water to the boiler; H,

reservoirs.

is a leg which supports the rear end of the boiler.

The boiler is constructed so that it shall present a larg heating surface, by filling the body with tubes, and also by having water spaces completely around the fire chamber. The kettle is so made that it forms the inner concave shell of the,,boiler as shown in Figs. 1 and 2 and is inclosed by steam channels for heating the material on all its sides as plainly shown in all the figures. The color in Figs. 2 and 3 represents the water in the kettle and boiler, while the remaining space in the boiler is filled with steam. On one end inside the boiler is placed a tube (6) which reaches down quite to the surface of the water and rises nearly to the top of the boiler. The object of this tube is to keep up a good circulation of steam, for the volume of steam will rise and circulate through the steam spaces around the top sides of the boiler and then descend into the tube (6) thereby keeping up a circulation of steam from top to bottom.

The reservoirs D, D, are made to extend partially or the whole length of the boiler according to the quantity of water to be held to supply the boiler as shown plainly in Figs. 2 and 4:. On the top side of the reservoir there are valves F, sliding in proper parallel ways and are provided w th holes; while the reservoir is provided with like holes directly below the valves. These valves which are worked by rods (a, 04,) when opened admit a pressure of steam on the water in the reservoirs D.

On the lower side of the reservoirs are valves G, G, secured in ways so as to slide and are worked by the rods (Z), 6) and are made with a hole, while the reservoir has another hole corresponding thereto. As these valves are opened or closed the supply of water to the boiler may be 'regulated'by the pressure of steam upon the water in the On the sides of the boiler close to the front end a pipe f) is inserted to feed the reservoirs, which pipe is made to be opened and closed readily by means of valves or cocks. The reservoirs may be filled by simply closing the valves F, and G, and opening the valve (f) Which Would allow any air or steam in the reservoir to escape, when they could be readily filled With Water, and the communication (f) closed.

I do not claim surrounding the kettle With steam as that has been done before; but

What I do claim and desire to secure by Letters Patent is,

The use of the kettle C, surrounded by steam as set forth in connection With the boiler B the reservoirs D, D, with valves F, F, and G, G, (or their equivalents) on the upper and lower sides and induction pipe 7, arranged constructed and operating in 15 the manner and for the purpose set forth and described.

ALLEN LAPHAM.

IRVING SNELL. 

